Silicon recovery from diamond wire saw silicon powder waste with hydrochloric acid pretreatment: An investigation of Al dissolution behavior

doi:10.1016/j.wasman.2020.11.005

	Silicon recovery from diamond wire saw silicon powder waste with hydrochloric acid pretreatment: An investigation of Al dissolution behavior
	Yang, Shicong 1; Wan, Xiaohan 1; Wei, Kuixian 1,2; Ma, Wenhui 1,2,3; Wang, Zhi 4
刊名	WASTE MANAGEMENT
	2021-02-01
卷号	120 页码:820-827
关键词	Silicon recovery Diamond wire saw silicon powder waste HCl leaching Al dissolution Thermodynamic and kinetic mechanisms
ISSN号	0956-053X
DOI	10.1016/j.wasman.2020.11.005
英文摘要	Silicon recovery from diamond wire saw silicon powder (DWSSP) waste is of great significance for increasing production profits and alleviating hazardous effects on the ecological environment. The purity of recovered silicon powder is determined by the purification efficiency during acid leaching pretreatment. Because the metallic impurities present in DWSSP are mostly physically mixed rather than chemically bound, the reaction rate is very fast in the initial stage of acid leaching, whereas it is difficult to dissolve the retained impurities in the later stage with the depletion of metal fragments adhered on the surface of the silicon matrix. Many prior studies have failed to consider the retained metallic impurities that reside in the inner silicon particle surfaces. Therefore, this study investigates the dissolution behavior of retained impurities via the dissolution of Al in HCl solution as an example. Thermodynamic results indicate that the Al dissolution process is dominated by entropic changes (Delta S-0), rather than enthalpic changes (Delta H-0). Furthermore, the dissolution behavior of Al is in accordance with the diffusion-controlled step in the Avrami mode, and the kinetic parameters were found to be A = 5.85 x 10(7), E-a = 49.27kJ . mol(-1), and m < 1. The determined dissolution behavior provides a clear understanding of the removal of retained metallic impurities from DWSSP via an acid leaching pretreatment. This study provides enlightenment for the further purification of silicon recovered from DWSSP waste. (C) 2020 Elsevier Ltd. All rights reserved.
资助项目	National Key R&D Program of China[2018YFC1901801] ; National Key R&D Program of China[2018YFC1901805] ; Major Science and Technology Projects in Yunnan Province[2019ZE007] ; Reserve Talents of Young and Middle-aged Academic and Technical Leaders in Yunnan Province[2018HB009] ; National Natural Science Foundation of China[51904134] ; Program for Innovative Research Team in University of Ministry of Education of China[IRT-17R48]
WOS关键词	KERF-LOSS SILICON ; SLURRY WASTE ; HYDROGEN DESORPTION ; KINETICS ; NUCLEATION ; REMOVAL ; METAL ; SLAG ; ELIMINATION ; IMPURITIES
WOS研究方向	Engineering ; Environmental Sciences & Ecology
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000604340900021
资助机构	National Key R&D Program of China ; Major Science and Technology Projects in Yunnan Province ; Reserve Talents of Young and Middle-aged Academic and Technical Leaders in Yunnan Province ; National Natural Science Foundation of China ; Program for Innovative Research Team in University of Ministry of Education of China
内容类型	期刊论文
源URL	[http://ir.ipe.ac.cn/handle/122111/43045]
专题	中国科学院过程工程研究所
通讯作者	Wei, Kuixian; Ma, Wenhui
作者单位	1.Kunming Univ Sci & Technol, Natl Engn Lab Vacuum Met, Fac Met & Energy Engn, Kunming 650093, Yunnan, Peoples R China 2.Kunming Univ Sci & Technol, State Key Lab Complex Nonferrous Met Resources Cl, Kunming 650093, Yunnan, Peoples R China 3.Innovat Ctr Yunnan Prov, Silicon Mat Ind Res Inst, Kunming 650093, Yunnan, Peoples R China 4.Chinese Acad Sci, Inst Proc Engn, Key Lab Green Proc & Engn, Natl Engn Lab Hydrometallurg Cleaner Prod Technol, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Yang, Shicong,Wan, Xiaohan,Wei, Kuixian,et al. Silicon recovery from diamond wire saw silicon powder waste with hydrochloric acid pretreatment: An investigation of Al dissolution behavior[J]. WASTE MANAGEMENT,2021,120:820-827.
APA	Yang, Shicong,Wan, Xiaohan,Wei, Kuixian,Ma, Wenhui,&Wang, Zhi.(2021).Silicon recovery from diamond wire saw silicon powder waste with hydrochloric acid pretreatment: An investigation of Al dissolution behavior.WASTE MANAGEMENT,120,820-827.
MLA	Yang, Shicong,et al."Silicon recovery from diamond wire saw silicon powder waste with hydrochloric acid pretreatment: An investigation of Al dissolution behavior".WASTE MANAGEMENT 120(2021):820-827.